U.S. Vice President Joe Biden on Tuesday said Republican presidential contender Donald Trump was selling a "sick message" about immigrants in America based on xenophobia.

Biden, considering a run for the 2016 Democratic presidential nomination, told a small group of Latinos gathered at his home that they should not lose heart watching Trump climb in the polls while taking a hard line on immigration.

Trump, leading the pack of Republicans seeking their party's 2016 nomination, has accused Mexico of sending criminals and rapists to the United States. He has promised to build a wall on the U.S.-Mexico border to keep out illegal immigrants and deport the 11 million illegal immigrants already in the United States.